Emery-wheel dresser



(No Model.)

G. H. DOUGLAS.

EMBRY WHEEL DRBSSBR.

No. 389,064. Patented Sept. 4, 1888..

UNITED STATES PATENT ETTcE-i CHARLES HENRY DOUGLAS, OF CHICAGO,ILLINOIS.

ENlERYWHEEL DRESSER.

SPECIFICATION forming part of Letters Patent No. 389,064, datedSeptember 4, 1888.

Application filed December 21', 1886. Serial No. 222.741. (No model.)

To LZZ when it may concern.:

Bc it known that I, GnARLEs HENRY Done- Las, a citizen of the UnitedStates, residing at Chicago, in the county of Cook and State ofIllinois, have invented a new and useful Emery-meel Dresser, of whichthe following is a specification.

My invention relates to improvements in cmerywheel dressers in whichwheels or disks are employed to revolve idly against the surface of thewheel to be dressed; and the objects of my improvements are, first, tocause the said disks to revolve more freely and with more firmness andaccuracy than the devices heretofore employed for that purpose; second,to effectually exclude emery and dust from the bearings and to providefor their more perfect lubrication; third, to provide an easy andconvenientmeans of taking up any rattle or lost motion caused by wear orotherwisein the bearings of the disk-shaft; fourth, to provide a meansof guiding the dressingdisks in a straight line in front of the wheel tobe dressed, and at the same time to afford aconvenient method ofadjusting them against the wheel as it becomes dressed away. I attainthese objects by the mechanism illustrated in the accompanying drawings,in which- Figure 1 is a top view of a hand emery-A wheel dresser; Fig.2, aside view of the large or disk end of the same, enlarged. Fig. 3 isa transverse section of Fig. 2 on a line through the center of the disksand shaft. Fig. 4 is an elevation of an emery-wheel dresser mounted onways. Fig. 5 is a top view of the same. Fig. 6 is a transverse sectionof Fig. 2 with the male centers upon the disk-shaft.

Similar letters refer to similar parts throughout the several views.

The disks B are attached firmly to the shaft a, which is suspended andallowed to revolve upon the conical centers d and e. In the center ofshaft ce there is a passage-way, y, for holding and conveying oil to thebearings, and also a passage, f, in the conical center e, through whichthe oil is supplied. Vhcn this shaft is in motion, the oil in thepassages gradually oozes out around the bearings, lu bricating them, andalso forcing away the emery and dust that may have settled upon thecenters. The oil is held in the openingf by a metal cap, i, that slidesover the opening.

A is the stock of the hand eincry-wheel dresser, which is made in twoparts and held together with the screws b and c. By setting up screw bthe center points, d and c, attached to the two halves of the stockA,are pressed into the centers of shaft a to make a close running rit,

and by this device the dressing-disks B are made to revolve firmly andaccurately when brought in contact with the revolving wheel to bedressed, thus making a true aud even face thereon. By backing out thescrews b and c the stock A will separate and allow the shaft a, withdisks attached, to be removed or replaced at will. A fine adj ustmeutcan thus be made and any unnecessary play from wear or otherwise easilytaken up. The diskshaft a. in Fig. 6 is provided with male cent-ers,which revolve in the boxes 7i lz., through which there are oil-passagesf f. This form of shaft is also adjusted to a close running rit by thesame device as Figs. l, 2, and 3.

C, Figs. 4 and 5, is a bed, to which is attached a smooth round rod, E,upon which the stock D :is made to slide.

F is aset-screw, the lower end of which rests upon the smooth bevel ofthe bed C, upon which it slides when the stock D is moved along on therod E in the act of truing a wheel. This set-screw is used to adjust thedisks B against the wheel to he trued, which it does by raising orlowering the end of the stock D,through which it screws, and causing itto tilt upon the guiding-rod E sufficiently to press the disks againstthe emerywheel.

The center point d in Fig. 5 is made to screw through one of the wingsof stock for the purpose of taking out and putting 1n the disk-shaft;also for the purpose of adjusting it to a close running fit. This isheld in place by a jam-nut or set-screw.

To use this form of dresser most effectually, the bed C is bolted orclamped to the stand with the disks B touching the emcry-wheel. Then byturning the set-screw F, so as to canse the disks to press against therevolving wheel, and by sliding the stock D back and forth upon the rodE, the face ofthe wheel becomes nicely trued in the exact line that theshaft E may be set.

The stock A may be made in one piece of metal, with a slot in it of theproper proportions to allow the end that holds the disks to open farenough to take out or replace the disk-shaft when required and to makethe necessary adjustments.

I disclaim the patents to Bush, No. 318,952; t0 Roberts, No. 242,046,and to Forbis, No. 367,287, as they do not embrace any part of myinvention.

What I claim as my invention, and desire t0 secure by Letters Patent, is

l. An emery-wheel dresser in which the disk shaft a revolves on conicalbearings, through which there are oil-passages f f, substantially asspecified.

2. A11 emery-whee1 dresser in which the disk-shaft a is provided with achamber or passage-Way, g, for holding and conveying oil to lubricatethe bearings of the same, asspecied.

3. The combination, in an emery Wheel dresser, of the conical centersand bearings of the disk-shaft a, and the oil-passagesf and g, forlubricating the same, as specified.

which extends into both sides of the stock A for that purpose, asspecied.

6. An emery-Wheel dresser provided with a bed, C, and a rod, E, or itsequivalent, upon which the stock D may be slid or moved from one endtoward the other, as on ways, for the purpose of dressing a true face orangle upon the emery-Wheel, as specified.

CHARLES HENRY DOUGLAS.

Vitnesses:

JAMES F. GRIFFIN, J oHN P. J oHNsoN.

